package io;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

/** 文件的赋值(单字节读写) */
public class CopyDemo {
    public static void main(String[] args) throws IOException {
        FileInputStream fis = new FileInputStream("cat.jpeg");
        FileOutputStream fos = new FileOutputStream("cat2.jpeg");

        long start = System.currentTimeMillis();//获取自1970.1.1零时到此时此刻的毫秒数
        int d;
        while((d=fis.read())!=-1){
            fos.write(d);
        }
        long end = System.currentTimeMillis();
        System.out.println("复制完成,耗时"+(end-start)+"ms");
        fis.close();
        fos.close();
    }
}
